In Principle what kind of machine tool is likely to be most

In Principle, what kind of machine tool is likely to be most economical for producing rotationally symmetric parts of the following characteristics:

(a) requires turning, drilling, boring, and parting off, at production rates os 10,000 parts per month;

(b) as (a) but only 10 parts per month;

(c) a very slender high precision part requiring turning and parting off, at production rates of 1000 parts per month;

(d) as (c), bu tonly 10 parts per month;

(e) as (a) but with a transverse hole;

(f) as (b), but with a transverse hole.

Solution

Option (c) is correct

As a very slender high precision part requiring turning and parting off, at production rates of 1000 parts per month to be most economical for producing rotationally symmetric parts.